Lazarus Pascal
Outlook Send Email using MIME Format

This example sends an email using MIME format via the Microsoft Graph Outlook REST API.
Chilkat Lazarus Pascal Downloads

Lazarus Pascal
program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.HttpResponse,
  Chilkat.Email,
  Chilkat.StringBuilder,
  Chilkat.JsonObject,
  Chilkat.Http,
  Chilkat.BinData;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  http: THttp;
  jsonToken: TJsonObject;
  email: TEmail;
  contentIdStarfish: string;
  sbHtml: TStringBuilder;
  numReplacements: Integer;
  content: string;
  bdMime: TBinData;
  sbBase64: TStringBuilder;
  resp: THttpResponse;
  json: TJsonObject;

begin
  success := False;

  //  This example requires the Chilkat API to have been previously unlocked.
  //  See Global Unlock Sample for sample code.

  http := THttp.Create;

  //  Use your previously obtained access token here:
  //  See the following examples for getting an access token:
  //     Get Microsoft Graph OAuth2 Access Token (Azure AD v2.0 Endpoint).
  //     Get Microsoft Graph OAuth2 Access Token (Azure AD Endpoint).
  //     Refresh Access Token (Azure AD v2.0 Endpoint).
  //     Refresh Access Token (Azure AD Endpoint).

  jsonToken := TJsonObject.Create;
  success := jsonToken.LoadFile('qa_data/tokens/microsoftGraph.json');
  if (success = False) then
    begin
      WriteLn(jsonToken.LastErrorText);
      Exit;
    end;

  http.AuthToken := jsonToken.StringOf('access_token');

  //  To send email, we'll POST to the following endpoint:
  //  
  //  POST /users/{id | userPrincipalName}/sendMail
  //  
  //  (The special keyword "me" may be used in place of a principal name.)
  //  

  //  The body of the POST request will contain the MIME source of the email in base64 format.

  //  Create a new email object
  email := TEmail.Create;
  email.Subject := 'Test Outlook API to Send HTML Email with Attachments';
  email.From := 'Mary <mary@somewhere.com>';
  email.AddTo('Joe','joe@example.com');

  //  Add a plain-text alternative body, which will likely never be seen.
  //  (It is shown if the receiving email client is incapable of displaying HTML email.)
  email.AddPlainTextAlternativeBody('This is a plain-text alternative body...');

  //  Our HTML will include an image, so add the related image here.
  contentIdStarfish := email.AddRelatedFile('qa_data/jpg/starfish.jpg');
  if (email.LastMethodSuccess = False) then
    begin
      WriteLn(email.LastErrorText);
      Exit;
    end;

  //  The src attribute for the image tag is set to the contentIdStarfish:
  sbHtml := TStringBuilder.Create;
  sbHtml.Append('<html><body><p>This is an HTML email with an embedded image.</p>');
  sbHtml.Append('<p><img src="cid:CONTENT_ID_STARFISH" /></p></body></html>');
  numReplacements := sbHtml.Replace('CONTENT_ID_STARFISH',contentIdStarfish);

  email.AddHtmlAlternativeBody(sbHtml.GetAsString());

  //  Finally, add some attachments to the email.
  //  Add a file attachment.
  success := email.AddFileAttachment2('qa_data/pdf/fishing.pdf','application/pdf');
  if (success = False) then
    begin
      WriteLn(email.LastErrorText);
      Exit;
    end;

  //  Add an attachment where the content is contained in a string.
  content := 'This is the content of the 2nd attached file.';
  email.AddStringAttachment('someText.txt',content);

  //  Get the email as multi-line base64..
  bdMime := TBinData.Create;
  email.GetMimeBd(bdMime);

  //  Now get it as multi-line base64
  sbBase64 := TStringBuilder.Create;
  bdMime.GetEncodedSb('base64_mime',sbBase64);

  //  Send the HTTP POST (i.e. send the email)
  resp := THttpResponse.Create;
  success := http.HttpSb('POST','https://graph.microsoft.com/v1.0/me/sendMail',sbBase64,'utf-8','text/plain',resp);
  if (success = False) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;

  //  The send succeeded if the response status code = 202.
  //  In the success case, there is no response body.  (We just get the response code to know that it succeeded.)
  if (resp.StatusCode <> 202) then
    begin
      json := TJsonObject.Create;
      json.Load(resp.BodyStr);
      json.EmitCompact := False;
      WriteLn(json.Emit());
      WriteLn('Failed, response status code = ' + resp.StatusCode);
    end
  else
    begin
      WriteLn('Outlook Mail Sent.');
    end;


  http.Free;
  jsonToken.Free;
  email.Free;
  sbHtml.Free;
  bdMime.Free;
  sbBase64.Free;
  resp.Free;
      json.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.